"When I was young" (mid 70's) we used to sell those at my Dad's parts store. If you can't find a color in aerosol that you want, you can mix custom colors, obviously
I would think you'd spend a LOT of money on "reloads" to do a whole car.
You'll get a LOT of snobbery about "what spray guns" do and don't work, but at the caliber you seem to be at-----and which I would be as well if you tried this, most any spray gun and compressor THAT IS IN good working order would probably give you better results.
There's quite a few sources for import guns nowadays.......................
